Here is a quote from James Jordan:
The other thing the devil does not want is congregations singing the Psalms because the Psalms are full of holy war stuff. If you start singing the psalms, you start getting iron in your bones.
You know that Psalm 68, “Let God arise and let His enemies be scattered,” was the marching song of the French Reformation. They would sing it as they went into battle. The Huguenots in France would sing it all the time. Of course, they didn’t have air conditioning then, so the windows were open and all the Catholics heard it, and it made all the Catholics so afraid that eventually the king outlawed singing Psalm 68 in public. So they’d go around whistling. And they had to outlaw whistling that melody.
Now, people are not afraid when they hear us sing “’Tis So Sweet to Trust in Jesus.” They are not worried about you.
HT: John Barach